CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > ANSYS Meshing & Geometry

[ANSYS Meshing] 3D Multiblock Structured Hexahedral Mesh

Register Blogs Community New Posts Updated Threads Search

Like Tree10Likes

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 30, 2013, 03:54
Default
  #21
Super Moderator
 
flotus1's Avatar
 
Alex
Join Date: Jun 2012
Location: Germany
Posts: 3,428
Rep Power: 49
flotus1 has a spectacular aura aboutflotus1 has a spectacular aura about
I think you should get rid of the "surface body" and the non-frozen solid body in DM before proceeding.

Now the next step depends on the type of interface you want between the blocks.

Method 1: non-nonformal interface
Proceed with the multiple independent frozen bodies.
This allows you to mesh every block independently. However, you will get an interface between each block which affects your results.

Method 2: conformal interface
Select all the bodies, right-click and "form new part".
There will be no additional interfaces created in fluent since the mesh transition between the blocks is conformal.
flotus1 is offline   Reply With Quote

Old   February 1, 2013, 05:02
Default
  #22
hee
New Member
 
Join Date: Jan 2013
Posts: 3
Rep Power: 13
hee is on a distinguished road
I've got it, thanks so much for your quick response!

Another question is that which model should i use in FLUENT to simulate an airflow of Re= 10,000? Is there any reference materials which i can refer to to obtain information such as boundary conditions settings (intensity & viscosity ratio), solution methods, time-step sizing and etc?

Thanks!

Regards,
Hee
hee is offline   Reply With Quote

Old   February 1, 2013, 09:54
Default
  #23
Super Moderator
 
diamondx's Avatar
 
Ghazlani M. Ali
Join Date: May 2011
Location: Tokyo, Japan
Posts: 1,385
Blog Entries: 23
Rep Power: 29
diamondx will become famous soon enough
Sorry for jumping in :

Quote:
you will get an interface between each block which affects your results
i have to deal with a very complex geometry, i like to mesh that in hexa. so i sliced and mesh each block and i'm planning to do use non-conformal mesh to join them together. Do you have any additional source about how bad they can be, limitation ? other than the fluent tutorial. Thanks a lot
__________________
Regards,
New to ICEM CFD, try this document --> https://goo.gl/KAOIwm
Ali
diamondx is offline   Reply With Quote

Old   November 11, 2013, 11:28
Default
  #24
New Member
 
sahar
Join Date: Jun 2013
Posts: 9
Rep Power: 13
sahar_hp is on a distinguished road
hi , would u mind sending me wb.zip too?
sahar_hp is offline   Reply With Quote

Old   March 11, 2014, 12:23
Default cylinder with finite length
  #25
New Member
 
Darázs Bence
Join Date: Feb 2013
Posts: 16
Rep Power: 13
darazsbence is on a distinguished road
Hi everyone,

I would like to make a 3d mesh with a circular cylinder in it, but the cylinder has a finite length, so it doesn't "touch" the boundaries of the domain. I don't know how to create a mesh above and below the cylinder.

Anyone has some idea about his?

Thanks
darazsbence is offline   Reply With Quote

Old   February 5, 2015, 00:03
Default cylinder with finite length
  #26
Member
 
Rahul
Join Date: Jun 2013
Location: Pennsylvania, USA
Posts: 31
Rep Power: 13
rrr311 is on a distinguished road
Send a message via AIM to rrr311 Send a message via Skype™ to rrr311
Hi darazsbence,

I know its late but just wanted to show a couple of meshing methods (for future). Even if it has finite length, you can mesh it the exact same way as mentioned above. But assuming you have another body other than the cylinder (cylinder+body) in the domain, then the basic idea for a mesh is shown in the attached pictures.

Best,
Rahul
Attached Images
File Type: jpg geometry.jpg (28.5 KB, 110 views)
File Type: jpg mesh.jpg (36.5 KB, 113 views)
File Type: jpg meshCrossSection.jpg (97.8 KB, 115 views)
File Type: jpg alt_geometry.jpg (24.3 KB, 91 views)
File Type: jpg alt_mesh.jpg (36.5 KB, 90 views)
Armin Mehradi likes this.
rrr311 is offline   Reply With Quote

Old   November 20, 2017, 14:28
Default
  #27
Member
 
Join Date: Apr 2017
Posts: 32
Rep Power: 9
Qkarl is on a distinguished road
hi, can i know the step to do those meshing? when i use multizone, i got an error which is found free block in swept body. I am doing with a sphere instead of cylinder
Qkarl is offline   Reply With Quote

Old   November 21, 2017, 08:37
Default
  #28
Senior Member
 
Gweher's Avatar
 
Gwenael H.
Join Date: Mar 2011
Location: Switzerland
Posts: 392
Rep Power: 20
Gweher will become famous soon enough
Hi Karl,

Multizone is not a magic option that will automatically generate a hexa mesh for all geometries. Here the error is quite obvious "found free block in swept body". You need to partition your geometry using slice planes in order to help the mesher and successfully achieve the mesh you want. I would recommend you to look at tutorials on blocking strategies to gain more insights on how to partition your geometries.

Have fun
Gweher is offline   Reply With Quote

Reply

Tags
ansys, hexahedral, meshing, multiblock, structured


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Moving mesh Niklas Wikstrom (Wikstrom) OpenFOAM Running, Solving & CFD 122 June 15, 2014 07:20
3D Hybrid Mesh Errors DarrenC ANSYS Meshing & Geometry 11 August 5, 2013 07:42
Icemcfd 11: Loss of mesh from surface mesh option? Joe CFX 2 March 26, 2007 19:10
How to control Minximum mesh space? hung FLUENT 7 April 18, 2005 10:38
Structured Grid Definition craig shores Main CFD Forum 3 March 21, 2001 15:48


All times are GMT -4. The time now is 17:10.